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    • 5. 发明授权
    • Class-F CMOS oscillator incorporating differential passive network
    • 带有差分无源网络的F类CMOS振荡器
    • US09197221B2
    • 2015-11-24
    • US14027635
    • 2013-09-16
    • Technische Universiteit Delft
    • Masoud BabaieRobert Bogdan Staszewski
    • H03B5/12H03L7/00H03B7/06H03B1/00H04B1/10H04B1/26H03L7/099
    • H03L7/00H03B1/00H03B5/1215H03B5/1228H03B5/124H03B5/1296H03B7/06H03L7/099H04B1/10H04B1/26
    • A novel and useful oscillator topology demonstrating an improved phase noise performance that exploits the time-variant phase noise model with insights into the phase noise conversion mechanisms. The oscillator is based on enforcing a pseudo-square voltage waveform around an LC tank by increasing the third-harmonic of the fundamental oscillation voltage through an additional impedance peak. Alternatively, the oscillator is based on enforcing clipped oscillation waveform by increasing the second harmonic of the fundamental oscillation voltage through an additional impedance peak. This auxiliary impedance peak is realized by a transformer with moderately coupled resonating windings. As a result, the effective impulse sensitivity function (ISF) decreases thus reducing the oscillator's effective noise factor such that a significant improvement in the oscillator phase noise and power efficiency are achieved.
    • 一种新颖有用的振荡器拓扑,展示了改进的相位噪声性能,利用了相位噪声转换机制的深入了解的时变相位噪声模型。 振荡器基于通过增加基波振荡电压的三次谐波通过附加的阻抗峰值来强制在LC槽周围的伪平方电压波形。 或者,振荡器基于通过附加阻抗峰值增加基波振荡电压的二次谐波来强制削波振荡波形。 该辅助阻抗峰值由具有中等耦合谐振绕组的变压器实现。 结果,有效的脉冲灵敏度函数(ISF)降低,从而减小了振荡器的有效噪声因子,从而实现了振荡器相位噪声和功率效率的显着提高。
    • 9. 发明申请
    • VOLTAGE CONTROLLED OSCILLATOR, AND PLL CIRCUIT AND RADIO COMMUNICATION APPARATUS USING THE SAME
    • 电压控制振荡器和PLL电路和无线电通信装置
    • US20080204157A1
    • 2008-08-28
    • US12035250
    • 2008-02-21
    • Takayuki TSUKIZAWAKoji TAKINAMI
    • Takayuki TSUKIZAWAKoji TAKINAMI
    • H03B7/06
    • H03B5/1228H03B5/1215H03B5/1243H03B5/1265H03B5/1293H03B2201/025H03J2200/10
    • A voltage controlled oscillator of the present invention comprises a reference voltage generation section 114 for generating a plurality of reference voltage based on a power supply voltage. A first to a third reference voltages Vref1, Vref2, and Vref3 are inputted to a first to a third variable capacitance circuits A, B, and C, respectively, at each one of terminals of each of the first to the third variable capacitance circuits A, B, and C. The first to the third reference voltages Vref1, Vref2, and Vref3 each has a fixed value, and a difference between the first reference voltage Vref1 and the second reference voltage Vref2 and a difference between the second reference voltage Vref2 and the third reference voltage Vref3 represent values different from each other. A control voltage Vt for feedback-controlling an oscillation frequency is inputted to each of the other of the terminals of the variable capacitance element of each of the n variable capacitance circuits such that the control voltage Vt having the same value is inputted to said each of the other of the terminals.
    • 本发明的压控振荡器包括:基准电压产生部分114,用于基于电源电压产生多个参考电压。 第一至第三参考电压Vref 1,Vref 2和Vref 3分别在第一至第三变量中的每个端子的每个端子处输入到第一至第三可变电容电路A,B和C 电容电路A,B和C.第一至第三参考电压Vref 1,Vref 2和Vref 3各自具有固定值,第一参考电压Vref 1和第二参考电压Vref 2之间的差和a 第二参考电压Vref 2和第三参考电压Vref 3之间的差表示彼此不同的值。 将用于反馈控制振荡频率的控制电压Vt输入到n个可变电容电路中的每一个的可变电容元件的另一个端子中,使得具有相同值的控制电压Vt被输入到 另一个终端。
    • 10. 发明申请
    • Voltage controlled oscillator, and PLL circuit and wireless communication apparatus using the same
    • 压控振荡器,PLL电路和使用该电路的无线通信装置
    • US20080036547A1
    • 2008-02-14
    • US11882945
    • 2007-08-07
    • Takayuki Tsukizawa
    • Takayuki Tsukizawa
    • H03B7/06
    • H03L7/099H03B5/1215H03B5/1228H03B5/1253H03B5/1293H03B2200/005H03J5/00H03L2207/06
    • A voltage controlled oscillator 100 comprises an inductor circuit including inductors 101, 102; a variable capacitance circuit 110 which includes variable capacitance elements 111, 112 for changing a capacitance value in accordance with a voltage difference between both of two terminals thereof and capacitive elements 113, 114 for cutting a DC component, and which is connected in parallel to the inductor circuit; a negative resistance circuit including cross-coupled oscillating transistors 103, 104; and a time-switched level shift circuit 108 for shifting a reference voltage to be output to two or more levels in accordance with time. A connection point A of the variable capacitance elements is supplied with a control voltage Vt for controlling an oscillation frequency, and connection points B, C of the variable capacitance elements and the capacitive elements are supplied with a reference voltage Vref output from the time-switched level shift circuit 108 via resistors 115, 116.
    • 压控振荡器100包括电感器电路,其包括电感器101,102; 可变电容电路110,其包括可变电容元件111,112,用于根据其两个端子之间的电压差和用于切割DC分量的电容元件113,114来改变电容值,并且并联连接到 电感电路; 包括交叉耦合振荡晶体管103,104的负电阻电路; 以及用于根据时间将要输出的参考电压移位到两个或更多个电平的时间切换电平移位电路108。 可变电容元件的连接点A被提供有用于控制振荡频率的控制电压Vt,并且可变电容元件和电容元件的连接点B,C被提供有从时间切换输出的参考电压Vref 电平移位电路108经由电阻器115,116。